KR101061236B1 - Cutout switch - Google Patents

Abstract

The present invention relates to a cutout switch. According to the present invention, a first contact bracket connected to one side of the insulator body, a second contact bracket connected to the other side of the insulator body, a first contactor fixed to one side of the first contact bracket, and fixed to one side of the second contact bracket A second contactor, a fuse formed between the first contactor and the second contactor, protecting the fuse, one side of which is inserted into the first contactor, and the other side of which is inserted into the second contactor, and fixed to protrude from the second contactor The projection and one side is coupled to the second contact bracket, the other side is inserted into the lower portion of the second contact, when the fuse blown cut-out switch including a flipper having a striker that strikes the fixing projection through the rotational force by the spring Can provide.

Flipper

Description

Cut out switch {CUT OUT SWITCH}

The present invention relates to a cutout switch.

In general, the cut-out switch is mainly installed on the primary side of the transformer to protect and open and close the transformer. The cut-out switch is a single-pole switch that blows the fuse holder itself by gravity when the internal fuse blows.

If the fuse in the cut-out switch blows, it will break from the high-voltage line of the power system and shut off the overcurrent. At this time, an arc occurs between both ends of the blown fuse.

The generated arc heat is extinguished by the insulating gas generated by the combustion of the tube inside the fuse holder.

On the other hand, the cut-out switch may be inferior in insulation characteristics due to damage to the fuse holder, or the fuse holder may be unbalanced to open the abnormal operation. In particular, the cut-out switch has a problem that continuous discharge occurs because the opening operation is not performed when the fuse link is fixed by deformation of the inner wall during the separation process.

In addition, due to poor insulation such as tracking of the inner and outer surfaces of the fuse holder, complete extinguishing may not be performed inside the fuse holder, and current may continue to cause arcing in the upper connection bracket, thereby causing fusion.

If the fuse link is fixed to the fuse holder, firing may continue until the arc is not extinguished and the fuse holder is damaged by burnout. In addition, even when the fuse holder is poor insulation, there is a problem that the adhesion by the arc is generated until the fuse holder is burned out.

As such, due to the delay of opening due to a defect of the cut-out switch, proper protection of the system may not be achieved, and thus there may be a problem in that facility failure or power failure of the high-voltage transmission system may occur.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cutout switch having a striker on a flipper so that the fuse holder can be quickly detached from the contact bracket when the fuse is blown.

According to an embodiment of the present invention, the insulator body; A first contact bracket connected to one side of the insulator body; A second contact bracket connected to the other side of the insulator body; A first contactor fixed to one side of the first contact bracket; A second contactor fixed to one side of the second contact bracket; A fuse formed between the first contact and the second contact; A fuse holder protecting the fuse and having one side inserted into the first contact member and the other side inserted into the second contact member; A fixing protrusion protruding from the second contact; And a flipper having one side coupled to the second contact bracket and the other side inserted into a lower portion of the second contactor and having a striker that strikes the fixing protrusion through rotational force by a spring when the fuse is blown. An out switch can be provided.

Here, the flipper has a latch connected to the second contact bracket; And a rotation spring generating the spring rotation force.

The flipper includes a protrusion which is inserted into the second contact, and the protrusion and the striker may be formed at sides facing each other.

In addition, the striker may be formed to be bent to widen the area hitting the fixing projections.

The cut-out switch according to an embodiment of the present invention may include a coaxial coupling the second contactor and the second contact bracket, and the second contactor may rotate about the coaxial.

The apparatus may further include a release spring formed between the first contact bracket and the first contactor to separate the first contact bracket and the first contactor when the fuse is blown.

According to an embodiment of the present invention, the striker is provided on the flipper of the cut-out switch to strike the fixing protrusion of the fuse holder, so that the fuse holder is quickly detached when the fuse is blown to improve the extinguishing function.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate a thorough understanding of the present invention, the same reference numerals are used for the same means regardless of the number of the drawings.

1 is a block diagram illustrating a cut out switch according to an exemplary embodiment of the present invention.

Referring to FIG. 1, a cutout switch according to an exemplary embodiment of the present invention may include an insulator body 1, a first contactor 5, a second contactor 6, a first contacting tool 2, and a second contacting tool. (3), fuse holder 4 and flipper 8;

Specifically, the insulator body 1 prevents the voltage from being charged between the fuse holder 4 or the first contact bracket 2 and the second contact bracket 3.

One side of the first contact bracket 2 is connected to the insulator body 1, and the other side thereof is connected to the first contactor 5. In this case, the first contact bracket 2 may be made of metal to allow current to flow. The first contact bracket 2 may be formed with a fixing bracket 16 to fix the first contactor 5.

The first contactor 5 is coupled to one side of the first contact bracket 2. The first contactor 5 is formed such that one side of the fuse holder 4 is inserted.

The first contact 5 is formed with an annular ring 7 into which the operating rod is inserted to facilitate replacement of the fuse.

At this time, the release spring 15 is formed between the first contact 5 and the first contact bracket (2).

The release spring 15 pushes the first contactor 5 from the first contact bracket 2 when the fuse is blown.

One side of the second contact bracket 3 is connected to the insulator body 1, and the other side of the second contact bracket 3 is connected to the second contactor 6. The second contact bracket 3 is made of metal so that current can flow.

The second contact 6 is formed to insert the other side of the fuse holder 4. The second contact 6 is coupled to one side of the second contact bracket 3. The second contactor 6 is connected to the second contact tool 3 via the coaxial 11 so that the fuse holder 4 rotates about the coaxial 11 when the fuse is blown.

The second contact 6 can be formed in a cylindrical or conical shape so that the flipper 8 can be inserted thereunder. The second contactor 6 has a fixing protrusion 10 formed to protrude from the lower surface of the second contactor 6 for fixing the fuse holder 4.

The fixing protrusion 10 is formed to protrude from the lower surface of the second contact 6. The fixing protrusion 10 is formed to protrude toward the second contact bracket 3 side. The end of the fixing protrusion 10 may be formed to be bent to have a predetermined. Accordingly, the fixing protrusion 10 may be fixed to the second fixing bracket 16 or the flipper 8.

The fuse holder 4 is formed in a cylindrical shape. The interior of the fuse holder 4 is provided with a space so that the fuse link can be inserted. The fuse holder 4 used in the cutout switch according to the exemplary embodiment of the present invention may be formed of two layers of tubes. The outside of the fuse holder 4 may use FRP (Fiber Reinforced Plastic), the inside may be formed of a vulcanized surface.

The inner tube of the fuse holder 4 is burned by an arc generated when the fuse is blown to generate an insulating gas. The insulating gas extinguishes the arc generated during fuse blow.

A fuse link installed inside the fuse holder 4 includes a fuse formed at a center thereof and support lines fixed to the first contact bracket 2 and the second contact bracket 3 at both sides of the fuse. Since the support line has a tensile force and is fixed to the first contact bracket 2 and the second contact bracket 3, when the fuse of the fuse link is blown later, the fuses are divided into two, and the support lines on both sides contact the first contact bracket 2 and the second contact bracket. The balance of the force holding the fuse holder 4 while moving toward the bracket 3 is broken, so that the fuse holder 4 is separated from the first contact bracket 2 and the second contact bracket 3.

The flipper 8 is connected to the second contact bracket 3 by the clasp 12. To this end, the flipper 8 is provided with a through hole into which the clasp 12 can be inserted. The flipper 8 may be formed of a conductive metal.

The flipper 8 is inserted into the penetrated lower surface of the second contact 6 to fix the second contact 6.

The flipper 8 rotates when the fuse holder 4 is separated to release the lock of the fixing protrusion 10. At this time, the flipper 8 is provided with a striker that strikes the fixing protrusion 10 when the locking protrusion 10 does not proceed smoothly.

The flipper 8 will be described in detail later with reference to FIGS. 2 and 3.

2 is a view for explaining the operation of the cut-out switch according to an embodiment of the present invention, it is a view showing that the flipper after the fuse of the cut-out switch is blown out of the fuse holder.

According to FIG. 2, when the fuse is blown out, the support line for supporting the fuse on both sides is disconnected to both sides, and the support force holding the flipper 8 is released, thereby deviating from the flipper 8.

The flipper 8 is rotated by the rotary spring 9, and the protrusion 19 exits from the second contact 6. At this time, the second contactor 6 supported by the protrusion 19 and a part of the body is separated while rotating about the coaxial 11.

The striker 20 formed integrally with the flipper 8 strikes the fixing protrusion 10 while rotating. The fixing protrusion 10 is moved by the striker 20 is priced. At this time, when the second contactor 6 is not in operation, it may move due to the impact of the price, and if the second contactor 6 is rotating by the fuse holder, the rotational force may be accelerated.

3 is a detailed perspective view of the flipper shown in FIG. 1.

Referring to FIG. 3, the flipper 8 may include a protrusion 19 and a striker 20.

The protrusion 19 is inserted at the side of the second contact 6. The striker 20 is formed at the other side of the protrusion 19.

The striker 20 rotates in the rotational direction of the protrusion 19 when the protrusion 19 rotates about the latch when the fuse is blown. Accordingly, the striker 20 may accelerate the detachment of the fuse holder 4 by hitting the fixing protrusion 10 provided in the second contact 6.

In addition, the striker 20 allows the fuse holder 4 to be detached by hitting the fixing protrusion 10 of the fuse holder 4 when the fuse holder 4 is not detached after the blown fuse.

Therefore, the striker 20 may allow the fuse holder 4 to be easily separated, thereby preventing the discharge from occurring continuously between the blown fuses.

The striker 20 is manufactured integrally with the flipper 8, and the end of the striker 20 may be bent outward as shown in FIG. 3 in order to increase the area priced when the fixing protrusion 10 is hit.

As described above, the flipper according to an embodiment of the present invention is provided with a striker integrally, so that when the fuse holder is not detached, the fuse holder may hit the fixing protrusion protruding from the second contact into which the fuse holder is inserted. Let go. Accordingly, when the fuse of the cut-out switch is blown off, the fuse holder may be separated from the first contact bracket to prevent continuous discharge.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

1 is a perspective view showing a cutout switch according to an embodiment of the present invention.

FIG. 2 is a perspective view for explaining a flipper operation among the cutout switches shown in FIG. 1. FIG.

FIG. 3 is a perspective view specifically showing the flipper shown in FIG. 2. FIG.

<Brief Description of Drawings>

1: insulator

2: first contact bracket

3: second contact bracket

4: fuse holder

5: first contact

6: second contact

7: annular ring

8: flipper

9: rotating spring

10: fixed protrusion

11: coaxial

12: clasp

15: Breakaway Spring

16: fasteners

19: protrusion

20: Striker

Claims (6)

Insulator body; A first contact bracket connected to one side of the insulator body; A second contact bracket connected to the other side of the insulator body; A first contactor fixed to one side of the first contact bracket; A second contactor fixed to one side of the second contact bracket; A fuse formed between the first contact and the second contact; A fuse holder protecting the fuse and having one side inserted into the first contact member and the other side inserted into the second contact member; A fixing protrusion protruding from the second contact; And One side is coupled to the second contact bracket by a latch, and the other side has a striker inserted into the lower portion of the second contact, and when the fuse is blown, striker strikes the fixing projection through the rotational force by the rotating spring Include flipper, The protrusion and the striker are cut-out switch, characterized in that formed on the side facing each other. delete delete The method according to claim 1, The striker is cut out, characterized in that formed to be bent to widen the area hitting the fixing projections. The method of claim 1, A coaxial coupling the second contact and the second contact bracket, And the second contactor rotates about the coaxial. The method of claim 1, And a release spring formed between the first contact bracket and the first contact member to separate the first contact bracket and the first contactor when the fuse is blown.

Images